Gemini 4 Carbon: not open yet, who gets it first
Checked against Google's announcement.
Google DeepMind · Oct 28, 2026
Why it matters
Announced, not open yet
On Oct 28, Google announced Gemini 4 Carbon, its strongest model so far.
- Who has it now. A small group of cyber defenders.
- Everyone else. No date yet for the Gemini app, developers or businesses.
What it is
Built to find and fix flaws
For long coding jobs and security work. Scores from Google's own tests.
- Finds them. 88.2% on SEC-bench Pro, a test of finding real software flaws.
- Fixes them. 71.0% on CWE-bench, turning findings into working code fixes.
Why it waits
Defenders go first
Google says it is taking a deliberate approach to the rollout.
- Fairwind Program. Early access for defenders like governments, hospitals and telecoms.
- Outside testing. It is in the US government's voluntary pre-release testing.
Google's claims
Fewer made-up answers
From Google's internal tests, compared with Argon, its current top model.
- About 2x fewer. Claims it can't back up, Google says.
- Asks first. It shows conflicting sources to you before it acts.
What you can use today
Today, use Argon
Carbon isn't in the Gemini app yet. Here's what is.
- Free. Auto mode, mostly Flash-Lite.
- Google AI Pro, Ultra. Gemini 4 Argon in the Gemini app.
- Developers. Argon in the Gemini API.
What you do now
Keep what you have
Google says Carbon comes to developers, businesses and consumers "soon."
- Free or paid. Nothing to change today.
- Developers. Same price as Argon: $2 per million tokens in, $10 out.
- Watch for. Carbon in the Gemini app model list.
Save this
Carbon, in one look
From Google's announcement, Oct 28, 2026.
- What. Google's strongest Gemini, for coding and security.
- Who. Cyber defenders first. No date for the rest.
- Today. Argon on Pro and Ultra, Flash-Lite free.
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Checked against official sources on Oct 29, 2026. The character in our posts is made with AI.